Expansible bracelet.



R. LOOG.

EXPANSIBLE BRACELET.

APPLICATION FILED MAY 31,1912.

Patented Mar. 10, 1914.

ATTORNEY COLUMBIA PLANOGHAPH CO4. WASHINGTON, D, c.

ETEE fdTA'liEiPATENT @FFfCE.

RICHARD LOOG, OF PFORZI-IEIM, GERMANY.

EXPANSIBLE BRACELET.

T 0 all whom it may concern:

Be it known that I, RICHARD Loos, a subject of the Emperor of Germany,residing at Pforzheim, in the Duchy of Baden, Germany, have inventedcertain new and useful Improvements in Expansible Bracelets, of whichthe following is a specification.

My invention in expansible bracelets, relates to a bracelet structureconsisting of a plurality of links and springs so articulated as toenable the structure to expand and contract within limits, determined bythe play between the links and the number thereof involved in thestructure. In this connection my invention has particular reference tothe method of construction whereby a larger range of expansion andcontraction is permissilole than by the structures hitherto in vogue,and previous to my invention. in so far as I am at present aware, andthe object of my invention is to provide a more durable and moreeffective construc tion for expansion bracelets than those hitherto invogue, and the features of my in vention whereby I attain this objectare characterized in the drawings hereto attached which when taken withthe correlative descriptive matter appended, forms part of thisspecification and the distinct features of novelty are pointed out inthe claims at the conclusion thereof.

With reference to the drawings: Figure 1 is a side elevational view of abraclet made in accordance with my invention, of substantially full sizeand illustrating the bracelet in a contracted condition. Fig. 2 is asimilar View thereof illustrating the same in an expanded condition; thetwo views illustrating the range of expansibility of the bracelet. Fig.3 is an enlarged vertical sectional detailed view of the link member andguide pins and a side elevational view of the springs involved. Fig. 4is an enlarged detailed view of one of my improved link units togetherwith its guide pins. Fig. 5 is a top plan view of another link memberand a fragmentary view of a similar adjacent one together with aswiveling block or short connecting link. Fig. 6 is an enlarged crosssectional view of the structure taken Specification of Letters Patent.

Application filed. May 31. 1912.

Patented Mar. TH), 19ft.

Serial No. 700.824.

on a line of Fig. 8 in a direction as indicated by the dart. Fig. 7illustrates a modification of my improved bracelet, wherein thestructure is diametrically divided into two semi-ring link structures inlieu of one continuous ring as illustrated in Figs. 1 and 2.

In the several figures similar characters of reference are employed todesignate like or the same parts where they occur wherein A refers toone of my improved link plates which is provided with a longitudinalguide way a pressed or otherwise formed in the inner surface thereofwhich has two parallel lateral walls 7) and o extemling longitudinallyalong the link plate A opposite each other. The guide way a and thewalls 0 and 0 thereof have preferably a rectangular cross section aswill be clear by the illustration Fig. (3. The link plate A carries apair of terminal studs (Z and 0; these are of uniform cylindricalformation and project from the inner surface of the link plate A in thesame direction and at right angles thereto and parallel to each other.

oppositely situated to the link plate A and similarly constructed is alink plate B having a guide way 1 of similar formation to that of theguide way a and oppositely situated with relation thereto when the linkplate B is located in apposition to the link plate A. Carried by andrigidly secured to the terminals of the link plate B are cylindrical.tubular studs 1 and l which are adapted to telescope with and snugly fitthe studs (Z and c of the link plate A.

C designates a swivel block or short link which is provided with twotransverse parallel adjacently situated perforations for the receptionof the tubular studs 1 and 1 of adjacent link plates A and B.

D and E refer to a superimposed link structure which is adapted to playbetween the link plates A and B; this is formed preferably of a strip ofmaterial bent or otherwise constructed so as to form the parallel curvedwalls f, 1, 2 and the curved ends g, 2 3 and 4;. Secured to and carriedby the curved ends 9 and -11 are guide pins 71 and 1; these are ofcylindrical formation and of a size adapted to slidably fit and play inthe guide ways a and 1 of the link plates A and B while the walls f and1 have a similar sliding fit with a tubular stud 1 of the respectivesuperimposed link plates B and A having the involved studs d aselucidated in the enlarged sectional view Fig. 3.

Interposed between the guide pins 72. and 1 of a pair of superimposedintegral links D and E and studs (Z, 6, 1 and 1 respectively, of thecooperative link plates A and B, are spiral compression springs F; theseare incased between the upper and lower walls f and 1 and 2 respectivelyof the superimposed link structures D and E and between the lateralguide Way a and 1 of the link plates A and B respectively, and arepocketed therein and there between. One end of these thrusts against therespective cylindrical tubular studs 1 and 1 and the opposite endthrusts against the respective guide pins h and 1*, whereby upon theexpansion of the structure, in extending the links as illustrated inFigs. 2 and 8, these springs will have become compressed and uponreleasing the structure when. thus ex panded the re-action of saidcompression springs thrusting against their respective abutments namelythe studs 1 and guide pins h and studs 1 and guide pins 1 respectivelywill force the superimposed link structures D and E to slide in oppositedirections, thus efiecting a contraction of the bracelet.

In the assembling of the different elements and units of my improvedexpansion bracelet, the link member B carrying the tubular studs 1 and 1is applied to the superimposed structures D and E laterally, and theguide pin 1 of the link E of the superimposed structures D and E isintroduced into the guide way 1 of a link plate 13 while the tubularstuds 1 of the said link plate is passed through the link E of thesuperimposed link structures D and E. The next member to assemble isanother unit or link plate B with the link D of the superimposed linkstructures D and E to similarly engage the latter link of the said linkstructure. The next operation will be to introduce the compressionsprings 1? between the tubular stud 1 of the link plate B and the guidepin 1 of the open link E of the superimposed link structures D and E,after which the swivel block or short connecting link G is introduced tothe corresponding tubular stud 1 in a manner so as to leavesubstantially onehalf of the said swivel block projecting for engagementwith the next pair of link structures, after which the link plate A isintroduced as a cover plate for the spring F and the guide pin 1 and theends of the tubular studs 1 and 1 In the assembling of the plate A theguide way a is placed in a position opposite the guide way 1 of the linkplate B in a manner whereby the curved formation of both guide wayscorresponds; while the guide pins and e are introduced into thecorresponding tubular studs 1 and'l of the link plate B. After thusassembling the link plates A and B they are secured against lateraldisplacement by heading the ends of the guide pins (Z and 6 whereby thelink plates A and B will be securely riveted together. It must beunderstood however, that the swiveling blocks or short connecting links0 must be sufliciently narrower than the length of the tubular studs 1to obviate their being jammed between the link plates A and B. Thearticulating of the respective link plates A and B and the swivel blockC, and the compression springs F is similarly proceeded with throughoutthe structure until the desired length in the formation of the bracelethas been attained.

In Fig. 7 I have illustrated a form of bracelet constructed inaccordance with my invention, whereby one-half of the circumference ofthe bracelet is linked with another half in a manner whereby means forclosing the same around the Wrist of the wearer is accomplished in lieuof the stretching of the bracelet over the hand, and in this connectionI have provided a pair of terminal links 1 and 2 provided with eyes andL which may be held together by a lock or other fastening device.

It will be observed by the foregoing description of my improved braceletthat by superimposing the links D and E upon each other, a considerablewide range of expan sion of the bracelet from its contracted conditionis permissible, while its neatness and artistic efiect is notjeopardized by the su per-position of the link structures D, E, and

Having fully described my invention I claim as new and desire to secureby'Letters Patent of the United States.

1. An expansible bracelet, consisting of an inner and outer series oflinks, each link of both series comprising two grooved side piecessecured together in spaced relation by a solid stud at each end of onepiece and corresponding tubular studs on the other piece, a part locatedbetween the side pieces of each link of each series, said partcomprising an integral frame formed into superimposed link parts andslidably connected to the said two grooved side pieces, substantially asdescribed. I

2. An eXpansible bracelet, consisting of an inner and outer series oflinks, each link of both series comprising two grooved side piecessecured together in spaced relation by a solid stud at each end of onepiece and corresponding tubular studs on the other piece, a part locatedbetween the side piece name to this specification in the presence ofeach link of each series, said part comof two subscribing Witnesses.

prising an integral frame formed into su- RICHARD LOOG perimposed linkparts, and having guide 1 pins, and a spring bearing against each ofWVitnesses:

said guide pins and tubular studs. F. X. GEORGES, In testimony whereof,I have signed my R. REIMSEN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

